Add docker prune command #29

docker/docker.go

@@ -266,6 +266,37 @@ func (daemon *DockerDaemon) Ok() (bool, error) {
 	return daemon.err == nil, daemon.err
 }
 
+//Prune requests the Docker daemon to prune unused containers, images
+//networks and volumes
+func (daemon *DockerDaemon) Prune() (*PrunerReport, error) {
+	c := context.Background()
+
+	args := filters.Args{}
+	args.Add("all", "y")
+	cReport, err := daemon.client.ContainersPrune(c, args)
+	if err != nil {
+		return nil, err
+	}
+	iReport, err := daemon.client.ImagesPrune(c, args)
+	if err != nil {
+		return nil, err
+	}
+	nReport, err := daemon.client.NetworksPrune(c, args)
+	if err != nil {
+		return nil, err
+	}
+	vRreport, err := daemon.client.VolumesPrune(c, args)
+	if err != nil {
+		return nil, err
+	}
+	return &PrunerReport{
+		ContainerReport: cReport,
+		ImagesReport:    iReport,
+		NetworksReport:  nReport,
+		VolumesReport:   vRreport}, nil
+
+}
+
 //RestartContainer restarts the container with the given id
 func (daemon *DockerDaemon) RestartContainer(id string) error {
 	//TODO use cancel function

docker/types.go

@@ -62,3 +62,11 @@ type Stats struct {
 	Stats            *types.StatsJSON
 	ProcessList      *types.ContainerProcessList
 }
+
+//PrunerReport represents the result of a prune operation
+type PrunerReport struct {
+	ContainerReport types.ContainersPruneReport
+	ImagesReport    types.ImagesPruneReport
+	NetworksReport  types.NetworksPruneReport
+	VolumesReport   types.VolumesPruneReport
+}